Unable to clear some fail codes ecm.

[samuel77]

It depends on the DTC codes you have. 
Some DTCs require additional procedures such as resetting fuel trims. Otherwise they will come back. 
You can also try clearing the DTCs from Orbit and then disconnect the battery for a long period of time. In some cases, stored DTCs are deleted with this. 
But before all that enable the details and see when was the last time they are reported. You might still have issues.

Thanks for the reply!

What’s a long time? 10min, 1 day? 

Also fuel trim I got an error that say error line 2 and it can’t proceed.